1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9e486fbf13c4b18da0658c173c15d7afcacf8edaed266d838f7cd0c582c665. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e22ce0a5-b38a-4279-b74f-eabe5797e092.json and https://artists.proofprofile.net/proofs/artist/e22ce0a5-b38a-4279-b74f-eabe5797e092.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedae491fadf98232de85a5d137434f7642294dddddb31cf18944589f7be18319. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFS2474881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f13b75da55f5f304e456b32a561e08f21e5a8c8f9d1ebb9e93555dfb63e1d5a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7P2458773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ab226c5337a5e886d057d6754d01d341a742af262ce1e4950319a7aa37db7d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7P2458774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58a2d6a975517852067dbf73d705fd19208555c9f27d2e06753ad19d563a56b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7P2458777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60093a4e1b7b85e870b64c23316bb741bd37a243a2f5916e7d4214f14d65e34. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7P2458779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8a17a575e85b05b1a1b84d067e68aa66578d9705a3dce08dd6f5a56aab1529. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7P2458781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06869cd8fe754779ef1440c21bfd931e4384c601cf25d6c2a9626f8487344f6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7P2458782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1bce78536d60db2f4e131c1fb0c4b4c04f86b9dc4557f786f2388b0e730b25. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA62562428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b94e43e3c6f7ba3048c142bbf0a5da2daa8dc9c22fbce05ed7ab883a2c4bdd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2509231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a84580cc2f8d359a51e26fb5227f5dad70eb30b991f64fac69947c1a04e2fce. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6M2568472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482ce37b5c4b967c72af7d31c5ba753a36213bdcfed05e95c03681f7999b5243. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb069ee2bf65409448280899f4ed8331209cf949e622bd80e9b44527396ae36c9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f6fd6f859a5133e1825bfedfedae64bd8d5826656477078dde21df3cabc695. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21feff8084cee20986970a7dd90b1fdbb48744fddde2b43031fd051022b87b3c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baaf380513147fd67b4a4417d7485d1bfc4d14a7fd8e5102ddb8b49f7f6b4eb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351ce7f39b28c36a48aca3f635b71ff45416dc8c126c4a613c96ff1b72df8549. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf452ab55c73916d4e06cbca68fe019b47009bf6707795b095efa71148f635e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba53774134b6259bb6efeaa98d34b8d14be36f55fd6fd1fb0b5d91a030811ea. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb59ca061084eb9a1977182e6d0de8f5518ed218b70dad6366337e411277cf3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84abbd5e7ab835ded90b52a575295c5f39e0cb4ed89b608c768386a7881efb3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3529d3cb6cc182cae08695896ae3b6e14e16e3df07dc11a8b0c341e31837bb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbedd52b0b7027297a6ec7a5236d77cbb9821b789741088c5a61efd3c15da243. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbdf2858616eaccd08f2fb84ca616bb496d6d881d1ed4c6a4af0186c924417d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817732066ee12124ebcfe87771bbc250ee163b94d60231ba7390cd8bfdaf7200. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d1e927aeeaf4122c9531151a895522df16dc0f0834d62680dc683f3be9c63e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275cbade6d29ec7b6da3d3951971ca1f4da59f906fb10ed0c9d7cea25f22dfb1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfb3d2bc7445519555367ac8d002cb9ce0fb7e1fc386b70dfc65393167bc493. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe297108ac69969f68fb7fdeff4e10af289274f3fb79a034f6e593a6adb274a9e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ee3cb6d8d71afe84e2f3dc7e72a05914dc3734cf72344c2f6d199f9d8c5b8a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2585638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bea36093d2fb4b85d67037e858214eb52e389e7dbe9270f078723614d21565. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ772510284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320973093ef461a005c87d949ca475862741fdba6dfdb84dfdfe90fbd6037881. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F22538623.